Car-truck.



No. 739,801. PATENTED SEPT. 2'2; w. s.- ADAMS. OAR TRUCK.

APPLICATION FILED FEB. 25. 1903.

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PATENTEDSEPI. 22, 1903.

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OAR TRUCK.

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. BY I p MTORNEY UNITED STATES.

Patented September 22, 1903.

PATENT OFF-Ion.

WALTER S. ADAMS, OFPHILADELPHIA, PENNSYLVANIA, ASSIGNQE. TO

JOHN A. BRILL, OF PHILADELPHIA, PENNSYLVANIA.

C AR TRUCK'.

SPECIFICATION forming part of Letters Patent No. 739,801, dated September 22, 1903.

Original application filed June 21, 1902, Serial No. 112.588. Divided and this application filed February 25, 1903. Serial No.

11441966. (No model.)

To all whom-it may concern:

Be it known that I, WALTER S. ADAMS, a citizen of the United States, and a resident of the city and county of Philadelphia, State of Pennsylvania, have invented certain new and useful Improvements in Oar-Trucks, of which the following is a specification.

My invention has relation to pivotal trucks for cars adapted to be employed in connection with electric motors, and has more especial relationship to trucks wherein the bolster is supported on longitudinally-disposed upwardly-arched semi-elliptic or leaf springs arranged on each side of the truck beneath 5 the top bar of the side frames.

- The object of my invention is and reduce the cost of construction and maintenance of trucks of this kind and at the same.

time preserve a great many of the features of trucks of this class-namely, better equalization of the load under varying conditions of service, to produce an easy-riding truck both with reference to the superposed carbody and the action of the truck on the rails, to enable the axles of the wheels to be brought comparatively close together to produce what is known as a short wheelbase truck, and to secure'many other desirable features hereinafter referred to. This is a divisional application of the one filed by me June 21, 1902, Serial No. 112,588.

In the drawings fication, Figurel is a side elevation of a truck made in accordance with my improvements. Fig. 2 is a plan viewof the same. Fig. 3 is a section taken on the line 3 3 of Fig. 1 looking in the direction of the arrows. Fig. 4 is a side elevation of a further form of my invention. Fig. 5 is a section taken on the line 5 5, Fig. 4, in the direction of the arrows.

Throughout the various views similar ref-. erence characters designate similar parts.

The truck consists of the usual axles 1, wheels 2, and axle-boxes 3, the axle-box yokes or pedestals 4 having the inner and outer arms 5 and 6, extensions '7 from the outer arms connected transversely by cross-bars 8, the inner arms being connected by the top to simplify forming part of this speci- 7 bars or chords 9, and between the top of the and the top of the yokes 4 exaxle-boxes 3 tend the usual axle-box springs 10.

On the inner lower ends of the inner pedestaLa-rms 5 are formed inwardly and longitudinally extending lugs 11, which are provided with fiat upper surfaces 12. Said lugs 11 may be joined by a tie-bar 13. Additional tie-bars 14: may be used to unite the lower ends of the arms 5 and 6. On the faces 12 are seats 15, with flanges 16, which engage the sides of the lugs 11, and in said cups are springs 17, which support guide-caps 18, with recess 19, in which the ends of semi-elliptic springs 20 may rest or slide.

The bolster 21, of any desired form, is supported upon the semi-elliptic springs in the form of my invention illustrated in Figs. 1, 2, and 3 by means of the links 22, seated upon the recessed plate 23, secured to the top of the band 24 of the semi-elliptic springs 30, the links resting in the bibs 25, which keep the links in place, and upon the lower portion of the links rests a casting 26, likewise recessed and bibbed, which in turn supports the ends of the bolster 21, which pass between the links and under the springs 20, the flanges 29 of the casting being secured to the bolster ends by bolts, as shown in Fig. 3. The bolster 21 may consist of the lower bar 30, arched bar 31, and wooden filling 32. The arched bar 31 is so formed that the usual center and side bearings, which may rest thereon, may be clear of the transoms 33, which are secured to lugs 34, projecting inwardly and transversely from the top bars 9. The transoms may preferably have horizontal webs 35 and vertical webs 36,between which the bolster rests.

In the foregoing I have described a construction in which the bolster is flexibly con-,

nected with the semi-elliptic springs. I may also rigidly connect the ends of the bolster to said springs by means of strap-bolts 37, Figs. I

4. and 5, which pass around (or at the sides of) the bands 24 of the spring 20 and through the ends 27 of the bolsterlates, thus holding the spring. The lateral swing of the bolster in this case will be accommodated by a flexure of the spring 17in the direction of the motion.

From the above it is obvious that the spiral springs 17 support the semi-elliptic springs elastically at their ends, the differentrhythms of the respective springs so that all jars or vibrations are greatly reduced or eliminated before reaching the car-body, and it is immaterial whether such vibrations are due to the action of the brakes or to inequality in the track or road-bed.

In the foregoing I have described two embodiments of my invention, and it is clear that many others may be made which fall Within the scope of the following claims.

I claim 1. The combination in a truck, of a frame comprising top bars connecting axle-box pedestals, spiral springs supported by the axlebox pedestals, semi-elliptic springs resting on said spiral springs, and a bolster supported by said semi-elliptic springs.

sald pedestals, spiral springs resting on said lugs, semi-elliptic springs resting on said spiral springs, and a bolster supported by the semi-elliptic springs.

5. The combination in a truck, of a frame comprising top bars connecting axle-box pedestals, lugs projecting from the inner arms of said pedestals, cups resting on said lugs, spiral springs resting in 'said cups, semi-elliptic I springs supported on said springs, and a bolster supported by the semi-elliptic springs.

6. The combination in a truck, of a frame comprising top bars, connecting axle-box pedestals, lugs projecting from the inner arms of said pedestals, spring-cups on said lugs, spiral springs supported in said on said springs,longitudinally-disposed semielliptic springs the ends of which rest in said guide-caps, and a bolster supported by said semi-elliptic springs.

7. In a car-truck, the side frame, lugs on said frame, spiral springs supported by said lugs,gaide-caps resting on said spiral springs, and semi-elliptic springs with theirends supported by said guide-caps.

S. The combination in a truck, of a frame comprising top bars connecting axle-box pedestals, spiral springs supported by said axlebox pedestals,sem1-ell1ptic springs supported by said spiral connected with said semi-elliptic springs.

9. The combination in a truck of a frame, means connected with said frame for sup- 10. The combination in a truck, ofaframe, means connected with said frame for supporting longitudinally thereof a plurality of semielliptic springs,a plate resting on said springs, bolster supported by said links.

1-1. The combination in a truck, ofa frame, means connected with said frame for supporting a plurality of semi-elliptic springs longitudinally of the frame,a plate on said springs, links pivoted to said plate, and a bolster with cross-pieces attached to its ends and pivoted in said links.

Signed in the city and county of Philadelphia, State of Pennsylvania, this 27th day of January, 1903.

WALTER S. ADAMS.

cups, guide-caps 

